class Car:
"""一次模拟汽车的简单尝试。"""
def __init__(self,make,model,year):
self.make=make
self.model=model
self.year=year
self.odometer_reading=0
def get_descriptive_name(self):
long_name=f"{self.year} {self.make} {self.model}"
return long_name.title()
def read_odometer(self):
print(f"This car has {self.odometer_reading} miles on it.")
def update_odometer(self,mileage):
if mileage>=self.odometer_reading:
self.odometer_reading=mileage
else:
print(f"You can't roll back an odometer!")
def increment_odometer(self,miles):
self.odometer_reading+=miles
class Battery:
"""一次模拟电动汽车电瓶的简单尝试"""
def __init__(self,battery_size=75):
"""初始化电瓶的属性"""
self.battery_size=battery_size
def describe_battery(self):
"""打印一条描述电瓶容量的消息。"""
print(f"This car has a {self.battery_size}-KWh battery.")
def get_range(self):
"""打印一条消息，指出电瓶的续航里程"""
if self.battery_size==75:
range=260
elif self.battery_size==100:
range=315
print(f"This car can go about {range} miles on a full charge.")
class ElectricCar(Car):
"""电动汽车的独到之处"""
def __init__(self, make, model, year):
super().__init__(make, model, year)
self.battery=Battery()
my_tesla=ElectricCar('tesla','models',2019)
print(my_tesla.get_descriptive_name())
my_tesla.battery.describe_battery()
my_tesla.battery.get_range()2019 Tesla Models
This car has a 75-KWh battery.
This car can go about 260 miles on a full charge.
